3×7= 4×6= 23+27= 9+76= 2×3=
6×6= 45+21= 67+7= 40-13= 25-16=
8×2= 81-18= 6×9= 30-2= 18+37=
2×5+9= 4×7+7= 48-18-12= 7×8-20= 5×7-5=